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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '12397e546089f6e3969304cb0eb163a99b1a3dd3b849390bc3e0d27c3ca63e86' 
  AND token = 'K57hD0CrZgm9RljfWHgBdMnmnjjk8qsd5w3iQZo8HI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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