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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e28fde7dae9f693a1e500fa4b285ab64fc10ca13827d5226db6c2ef39dce91' 
  AND token = '3Dnu42f2FLYXjO52bPch1GWIrVYkiMOF1ywr74yCJ8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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