Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fd8e3ee6fd2487dad4a5d87971951c2a6092ec2e4dc305a66eac2ce0f2bff07' 
  AND token = 'qVSKW+fRxthnayNH/fuFsAoemjdAYYK/utOCc3UW0g0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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