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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52a12afd743788dd506211f29263ba55461cdac63cfef0eb790e3b0fb0efa163' 
  AND token = 'LJCDRe4OsmtN1jL7Ed9yRjx8Vu+FHTH/U7c9hbfU/cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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