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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd80a58f6d97bb9dd9200ceddb254f886e69447e39e8bc0836fe64565ab7fbf79' 
  AND token = 'ITZXKT5byRScUkLVrCgFUfXu+5r5RcaCf6QS4zw7BXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00140

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}