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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9463efef36a2c858ccd5dbeb49a0f80814713f33bd3126f9dfdb125b41ed2071' 
  AND token = 'nwcRcF+dUw3hv/zZzJNQOMPtt2LoZFrg20yRgfnHa5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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