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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '970fdd48f70c160b5f685ab3c24c0886c7b052b3dbd40a67e6118421ef92e580' 
  AND token = 'okqVmG4yUz0HFk/Z2Mepkb0rN/4dC7j4JBPFp3dyzII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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