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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '520cd34a5ef010275544ab8936acf953c90fda843742face6c8c729e71b72cd8' 
  AND token = '7YYiSRSrI6Sa+rkgmfKnMO1Y9m1ZzDF+KuPIx5gbz/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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