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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e88cf2130ee88e29188e952f29ca2fca95466c081d19600f57d125b72252b986' 
  AND token = 'QFYRyjZtCLxVp4xvzt2peA8Gm7gx1w3sOZWgaWNC94U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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