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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6beb309197598827435f7af74f40c930d3ed67f74cc762041d5ba061745f4db0' 
  AND token = '0WK4XUmtbxTVUjPe6mba05TdgZXnR0SfIYNiiF2uwpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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