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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a41179b9e7d83cd33e8577dd28857c949e89ea3b039f904a85e1f01a1ccc001' 
  AND token = 'gsCghY1M0OYCKI3WVb8fgwjQhEXxF6hex/ot9f6lI9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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