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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a0e9489bb1dbe251cd288529573d6d1ae8dbfe30cfb2257cc59da91feb94f07' 
  AND token = 'VXvGNgztwWPgCit+HeuVy454XiLx8W719ujvATisYww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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