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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e69f10ddf6032fcdb68df6363f4bc8cc402da53df3f533ece4205113ebdef6ee' 
  AND token = 'VVXW3h8nM4R6w4o8hMi6c8J7el2O6US6340PQY6xOm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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