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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23054fc11de50d2318dd8e7110bd94984e0e70b51ac7545981b9259494ff8824' 
  AND token = 'qAZZFkgPSq5NmKySF4wCBvCG5P4w1aPf4TYbiHKCcwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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