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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '014b04404b6a9c4adc9e8d02f49c36a045a0b2053bbd832781eb61af26e9552c' 
  AND token = '1DtG4P81yrfDHeBgpY7GYm+Qr4ii91gxFnBKDZXkEVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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