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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7334887dd32f09e085de5ab4b3964ead6b144301343f1df3ead41b727d365ae9' 
  AND token = 'v04Pi+rGYdo5Dojwtzlgp24RdYwZTAan4Kis8IreXuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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