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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72f2e22893776e311fff6d769df8b33c3adf41b54239fd3d71553cdd2b377099' 
  AND token = 'wlTvdm0sc6mONRXQOANfm961xeBL216p4kl6/nA/jpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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