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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9585db03f3f2a1ec19c118fb6c67a92f735350c7300d098f77bd4cc2eb25b9d' 
  AND token = 'xaCaeK6PxPcQ4f8QKypJW05m11TAhaDP4jX5s6jNlHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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