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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32c0384b1a6a8ffec08290e00aa31c6f7aa4403770a0383225c4ca499beaefd0' 
  AND token = 'VTv4FBYGPuiiu4mMZIHsQk9pwGz9woIiO7oWBxU1ymc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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