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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c907004c1104f3d57f826a68826a1b1c16df3f9ea164d6b2a1f60320c53febd' 
  AND token = 'd/OM/5qSjl6qhkA3St9xUTmaH5OIWqtvyPCX304XdX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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