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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '280132778d82754db0bc9da28e97c8c411cc4859ed019379f4457aeadac84f5d' 
  AND token = 'bs6ekgWBmobqBEXZnhgqvL0Q2sh4sFAd1Hz2FqDhBMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00849

JSON explain

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