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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '493f5d5880a386addde9fb949e3f7b4cc5a769d8cd13960fa8fbe5e33a19230b' 
  AND token = 'uo6HsmckG2Zy15YeNKroosEvkCDNjLPrJG4ZLnQPW5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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