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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '063bcd112c43599d677eaf3dc97dd828c1f82a7c7247f4504528f78e00e04edc' 
  AND token = '1GHiog9/R5LmqiQ1zv7pFrTa/nCKX44os6Hk31FZlsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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