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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f938c881ba639641bbf4857f68b2bc2d86618395c2e80b2e56ef43b79977151' 
  AND token = 'shTWfp5Cbv/sNikERrXUFEh+4E6NZeiFPkg3lD1eSt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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