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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aa65977edaeaf81d626ecda91732be56e7a4cc902ff73dca1acd9053d9d69a2' 
  AND token = 'UOfHAEBC/RLqq+VHllrBVps0DR8m9NzeNpzKqphBUBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00113

JSON explain

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