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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9acac935e2a398ab50e9519e62fdce7cc92f65040b1ade4ddbfd13e265110918' 
  AND token = 'y117NbohFPw6wPFrhpHi5nQLH4ylt6D5PlXU7RZ5aCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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