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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa8b0b47b2358b8b06a14c6475f029b4cfa79eb74d9785b192300e6fa2dab658' 
  AND token = 'P0/hcEbRLd16UphPb76aE2dPhoxiRKLxtLUQSA0dvxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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