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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64055d2ceb89a6179d62c7f63c3fc1e958481f787eac3b34c8d7f239597609b0' 
  AND token = 'Jqa8fTyipPD7yTw9nDDblBxlSRCjO3X3lhJslSplaWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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