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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5366766791f11dab263259fd40b0e335fa541c82862940c59c6bb5199ee2cc2' 
  AND token = 'fHwIKkWoRm/IxHFY71yCaHfJy7eW3sGH6McyO63uynA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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