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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '096938df1308962e2d76747bc8ffd4fca58ff011ba9c16c83b56697f79e6b729' 
  AND token = 'IQvd80omNt2igJNuTyqDzafZ5RVptFVTF53A9D5+uAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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