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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b87f301d0898eeb36aefa2ea63efc69c0b06b3120cdb8b314a61e45226d0fe71' 
  AND token = 'oXI8vesD0BJJvU/ZUiQFZVG8zd873FwJP+LPJ0ZkUx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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