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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ac3d54db95752ce02c0cb5aa07e7250c671e3e6fcfecd42c0996941ff04092' 
  AND token = '4o8VmZ7R/R2oehRO9S4ZWf1iQSBYaYJzqh9fCQsDMbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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