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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7b522cdc974b3e1716eb557fbb7940be6fd029fd1040a54504f8769e1a2335e' 
  AND token = 'JvyTJ1igR98xj11rEXa9dOCe12Z6hQlsQHU2KTTGCV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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