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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bee09a59a218e5cc98bd79e425409c179e9ed102f63a3199235c0bb7a10ac68b' 
  AND token = 'ozjOpJ1XEfK8caMl/xaWSmlks6HgUWsYrUv424JlFoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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