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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6fd18c4b64d3ddf32d8e6550444bcef308b8cac194c1f8558c835b27f83da660' 
  AND token = 'qlkqtXjTuWPmqseD2Q5D9yR7ErG/MumO7I0Af1oRpOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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