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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c93c146e1fdfaed18f53d11ec49c02f623f5e1adf416febbaaaab1af882d5962' 
  AND token = 'tIl609wqASRzeJn5s19oIbhpyVX/XnJnR1UwN4XvMuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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