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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '922950f3ead722f76624a9a590ef0d0cce78aebc6b8832eda0fef20bbe45b019' 
  AND token = 'brs7nkwHhsooGDVdz5O38xeX2nDgY2pCLOa4CUULi+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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