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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab877888df48b28a885d7dc068e4dc2d7b526115110edb1a32b3756a0443df37' 
  AND token = 'aoaokg8ROVmEp+JUZWUaQtIkaKNQH/lCMLIuCZopADc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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