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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bedba88902dbf0bf02c2dbf1b1f74cbc8e976bc1fc193714831e356dcf9e385b' 
  AND token = 'DUQ2UGMq7BRUU7eOfKNwWbF5An1vM9+XG6BkrkyjKMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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