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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf470a394a72979357ee48679b7d5a1acfa6f096c280b66fcd6f3c3dfd6fec6' 
  AND token = '7nRerpelvslyWi8pgRm84Yp+bKOIFklqBDQrJondn60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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