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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b2b030c90cd5d85bb00eeba6da74c070337421d34dcbca8504762035f447c7b' 
  AND token = 'iZvDFal1/eYCkxM6GlUTNk3G1LaHoEEjTVwVi7Oakcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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