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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ee7be0cbd7eaa00c620645bbdcbc8deee1cad07f2d8caeca1130c91c3db0134' 
  AND token = 'mdac3sUo8x7y8mH+C4mO3vE1SPh9dWYtnPrCUaHG78c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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