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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05b3d23c7fb81cba8924c3757470a821d1e677e90d42fae4ef13b300d200e99d' 
  AND token = 'qU/KPbuX4oVn/Dbl7KNbGdKCNRPAoiJSdR6xrHmp7aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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