SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ba2321d032246b85e1f20e874743f3189f6b67d7835dd18d9f1b19f0def467c' 
  AND token = 'CWLn3ODyB+LJA+Vg7YzGPiax96A1sql/OHS4q2rP0Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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