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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '170d4b0da99779611eb96cbae3433308ebe1e111d594881e84c1341969dd0cbc' 
  AND token = 'iprYywBioRJHzyb3/JIwhhnMNI3II7VVmEfuWv0lRlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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