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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34e44fb98b434fc9a57b7bdc2b22ac866f9e6e8be439ca9eed4a9939a7a32388' 
  AND token = 'STqL9/c8rVoMK6bRtgIqaTjSPhK7akYpRX1rg32c6k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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