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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44e2b295173fa8b999859509b06753a0096cdbde82e5e8edbc34665f02b9f2c5' 
  AND token = '/ZjzU3GtZOLcSANj71/7M9zHfvtesMK2fDD+jtcEtCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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