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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02ed23e27c0c6b3bd1403c290e0ad2f9879cd017f52870240102f500184fc90a' 
  AND token = '0kO5ognwgTiGVBdMW9jTjwEVSfFgXsgNZmWOirn626k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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