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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab4ae2883761c79b1550b7665cd197ada9a3e6c64cd1d2834593e6e8fc6f2519' 
  AND token = 'evYol76wwNsgXPHy5UT255/gH1B3SpkmAn0IPsdgSxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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