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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35470e63f0171f3afbe7b7268fcb0e0bcf738db42342e656dc2b5d82d1959377' 
  AND token = 'zYx4AUUII3cv9CxkcDhbuivsId4W/R5OcQ/a2IykVdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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