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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d33760a10ad2e16db68eee0cdb1259c3e6c9a7e9bb789dd2ab873161a0117cc' 
  AND token = 'UIXoZbX1SJmyjRZeb0OSHp8knRJs5T7Jz502D1MeB3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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