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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc31119d7d4e75ab505ccea38156614ded4f1cde3882e93fc27c3e10abc25947' 
  AND token = 'SKbHNuxlBbe7fakI7ORQzpUu92maDj5CxML1tqvbwPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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