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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8076246f7d9074f0405b5bbf92f385258ae64ce7cb0fa0e93fe0f8081a80e20b' 
  AND token = '3iliUo42ZAlAc94+/dyYSmBa2qP8zyJAOotIw9oc0lI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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