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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d785b3fb2fbcc11b4ea1dfdd9d79c1f02b3db5fa4838cc17e0d5d39920df6ce' 
  AND token = 'z4EZ/zZeDXUZ972jP0lxwH+q0aGAjEvXWxe3bBXpT20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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