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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0bd62f43a4da4a4a39bebafcfff9cc9746c3efbc5c477067a538ab69937c073' 
  AND token = '4Q4IL6ONTIU+GLHdu3p2/+4p3JZPZ/KwyOeZlirCmHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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