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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '625630a2e31f4c892a810fd3ec191cf953172e80f2ba9650caa6fef5e6d5cf5c' 
  AND token = 'WeDF/hizuKAA62h9qDLqGduhWoEXGWyr/q3D6Vw+NMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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