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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2234b67173a48955e1750e6e7fcb5ecab47c74545d7ac8318ec73248a31b6bfd' 
  AND token = 'i+mt43gu2BJsMn4lxMbRwaXzQ6dL8ahpO7+aaQpzR/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00104

JSON explain

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