Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '51d11446356cd6f36390e0e2a1fbb7a955499b61758ea8fe67ab2f5f844d9151' 
  AND token = 'kqTWf91vh6vIvH/lrTpn4UBCC5Mes6/E+en55px9XH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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