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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd9b7cfc74772fb6607cd514d119388acf377d146b2d660f880545db67f8cea0' 
  AND token = '8sXZhbDoin/L09/1HtAL8G3b/i4Y//993Y/mD6biJHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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