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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d033bdce771a6850bd798e8f2ae9b3c67811f6fea196ecfb22daee00960b12b' 
  AND token = 'JCI+exGFc0aeIfvpAdi5jwa5Hr17eEt6XDN86dWuPmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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