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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aa7aaa313220c3b0d3968ddb2ea38d56c650a62571ed9b895846bf4cf7dd165' 
  AND token = 'aS7Ii9+aas+n0TXo38CgxL0t4qnO/8O/4xvYXx86cB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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