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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff93a5ece4a8347fd5f4ac8e4d575fb75072872cff75c4831a0e739c0722f2dd' 
  AND token = 'X1CWb6ZHhH+yLlePtbek6lPnryYQH4JYCD8wd2wNTfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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