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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb628194535eabed6abf66f8bc40ff53e8c72ef264810240f6371c24cedc8e0c' 
  AND token = '2Pa4z2vJdCQBtHZMB0yemrKUKda00qtxm+p56Ev4DXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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