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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edd7809183d1b8bdda8a6827cfeb9d81b076d4d7ea3c581ba8c07acf2e091cad' 
  AND token = 'PAI/O/Ict6nZnirWu0azGq2HMAjqH6z0UL30Wi45wSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00097

JSON explain

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