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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '046e6bcbe0062a637b8424d2b185c57181b7672aecc0f258bfcf257666c04add' 
  AND token = '58zAVfjIa+NorzIbAQ+xi7xNgmoQ98m/WupZVyLK39s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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