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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9827e2346f17dc64facd53b6c681ef12482ddedfc72cc6f2eb68695476571c12' 
  AND token = 'rF/Hss2tQ2QmhRfQsArebyjyLp3Tc7WNs9t0kQmf2WA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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