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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69a45fe0fe498616539a913f22a8d46a72d08c02c3b26ca756bfed0225476665' 
  AND token = 'KkVco2FDG/mg/DgBPpkcLVOXWqd7kW5u0BoX75Ofc+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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