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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2350c1447871cc43b798ce1091ce9cef3130189902d21668a9462612ac908477' 
  AND token = 'uO+05B0aM9uosXx9HShZs1VK0+v1oX/eIr3CgPw4QgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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