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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1ce0d08c6f972174377b75b0d8349b1c8b5737056ba594e2070731f47f82fd5' 
  AND token = 'NcOpyqi1eJVBm0szWu2F+iqcHB/htqYa6zSX2QFA7NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00086

JSON explain

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