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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63c0fda95eb6a15cee916362ff6060272173cf1f3bb0807b43061dddf7841438' 
  AND token = 'cW+oi++0EOOeiYKMouhxbARx2iO/RXiIIIU4akU+ns4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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