Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6955114f023cf4cde2bbe15291dbaeb9a33f172b0c433ac6bf4827b9fa2e5823' 
  AND token = 'fVhShgwBtAGSxDmDitUJ3YLpjw4eLPE2pnynniMfT8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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